Multiple solution stirrer



Oct. 27, 1959 H. D. BROWN 2,910,277

- MULTIPLE SOLUTION STIRRER Filed May 9, 1958 /Iu HH Ill' """llINVENTOR. HARRY D blzowN BY n United StatesM Patent O This inventionrelates to a solution stirring device more particularly for use inchemical laboratories, and has for its principal object the provision ofa simple and highly eiiicient multiple stirring device forsimultaneously stir ring a plurality of solutions from a single powersource, by means of which solution containers such as laboratory beakerscan be quickly, easily and safely placed in or removed from stirringposition while the stirrer is in operation. v

Another object of the invention is to provide means for detachablysupportingV a conventional glass laboratory stirring rod at an angle tothe axis of stirring rotation so as to provide a maximum stirring actionwithout it being necessary to bend or deform the rod.

Other objects and advantages reside in the detail construction of theinvention, which is designed for simplicity, economy, and efficiency,These will become more apparent from the following description.

In the following detailed description ofthe invention, Y

reference vis had to the accompanying drawing which forms a part hereof.Like numerals refer to like parts in all views of the drawing andthroughout the description.

In the drawing: f

Fig, l is a top View of the improved multiple stirring device; 4 f

Fig. 2 is a front view thereof;

Fig. 3 is a right side View thereof;

Fig. 4 is an enlarged, fragmentary, detail view illustrating a stirringrod clamp as employed in the improved multiple stirring devicegand iFig. 5 is a top View of the rod clamp, taken on the line 5 5, Fig. 4. I

The improved multiple stirrer is' assembled in a supporting frame which,as illustrated, comprises two end frame members 16 and 11 which supportan elongated top member 12. The end frame members 10 and 11 Y aremaintained in vertical spaced-apart relation by means of an elongatedtable member 13 which extends between the side members at approximatelyvone third their vertical height. A hold-down strip 14 is secured to andextends longitudinally of the table member 13 and is spaced from thelatter-by means of uniformly separated spacers A plurality of hat,elongated, beaker shelves 16 Vare arranged tto slide transversely of thetable member 13 between the spacing members 15. The beaker shelves 16are maintained in a horizontal plane by means of the hold-down strip 14,and each is preferably provided with Va linger button 17 to facilitateits being drawn forwardly or pushed back on the table member 13.

A horizontal (preferably square) bearing bar 18 ex-l tends between theside frame membersY 10 and 11 above and forwardly of the table-member13. The bearing bar is secured at its extremities in the side framemembers by means of suitable set screws Y19t. A plurality of vertical i'spaced-apart, tubular shaft bearings 20, corresponding ice V:in numberto the number of shelves 16, extend thiough and arev supported bythebearing bar `18. A relatively short stirring shaft '21 is rotatablymounted in each shaft bearing 20 in vertical alignment with the-longitudinal center line of each shelf. terminates at its upperextremity in a grooved belt pulley 22 and its lower extremity in `a rodclamp 23.

The rod clamps are formed from sheet metal bands which are folded in aU-shape about the stirring shafts, and secured thereto by means of keypins 24. Each of the folded'blanks extends radially from its stirringshaft to form two opposed clamping ears which may be clamped together bymeans of a suitable clamp bolt 26. An inclined, semi-cylindrical socket25 isl formed in each clamping ear which cooperates to form a rodchannel to receive a glass laboratory stirringrod 27. The axis of eachof the rod channels is positioned at an acute angle to the axis of theadjacent stirring shaft so as to place the glass stirring ro'din aneccentric, inclined stirring position to Yobtain a maximum stirringeffect from the conventional straight glass rod.

The stirring action is obtained from an electric motor 29 mounted on thetop member 12. The motors shaft indicated at 36 extends downwardly fromthe motor to Vdrive a double grooved motor pulley/'31 from whichendsimply supporting it on one hand while theshelf is pushed-back andthen lowering it, from the stirring rod.

While aspecicform of the improvement'has been "i Y described andillustrated herein, itis to Abe understood that the same may bevariedwithin the scope of the ap- -pended claim, without departing from thespirit of the invention.

" Having thus described the invention, what is claimed and desiredsecured by Letters Patent is:

A multiple.jsolutionmixer comprising: two upstandi ing end members; anelongated bearing bar extending horizontally between and supported bysaid end members; a plurality of vertical spaced-apart shaft bearingsmounted on said -bearingban a stirring shaft mounted i .'ber secured atits extremities to said end members and v extending between the latterbelow and rearwardly of said bearing bar; a plurality of spaced-apartflat shelves supported on and arranged to slide horizontally andtransversely of ysaid table member so that they may be drawn forwardlyto a position below said stirring elements; ahold-down strip slidablysecuring said shelves on A said table member rand means forsimultaneously rotatingallof said shafts; said means for simultaneouslyrotating all of said shafts comprising: an elongated'top member securedon and extending between said endmembers above said bearing bar; avmotorsupported on said top memberfa motor shaft driven by andv extending i(References on following page) Each stirring shaft 21 The.

AA: beaker can be removed without stopping the motor 29 by ReferencesCi-l'ted in the le of this patent UNITED STATES PATENTS Horton Nov. 28,1922 Webb July 13, 1926 Simmonds Aug. 31, 1926 Andrews Feb. 15, 1927Hancock Ian. 26, 1932 ONeill Mar. 30, 1948 Schwndt May 23, 1950 ONeillAug. 7, 1956

